def tokenize_params(params):
    for param in params:
        if '|' in param:
            yield [p.strip() for p in param.split(' |')]
        else:
            yield param.strip()

def tokenize_line(line):
    line = line.split(';')[0].strip()
    key_params = line.split(' ', maxsplit=1)
    if len(key_params) == 1:
        return tuple(key_params)
    else:
        key, params = key_params
        params = [p.strip() for p in params.split(',')]
        return key, list(tokenize_params(params))

def tokenize_lines(lines, prefix=""):
    for line in filter(bool, lines):
        line = line.strip()
        if line.startswith(prefix):
            yield tokenize_line(line)